Предмет: Алгебра, автор: damirkadyrov1111

40 БАЛЛОВ!!!

В группе из 10 спортсменов 6 мастеров спорта. Отбирают (по схеме без возвращения) 3 спортсмена. Составить закон распределения случайной величины X - числа мастеров спорта из отобранных спортсменов. Найти математическое ожидание случайной величины X

Ответы

Автор ответа: ramazanismailov305

Ответ:

10-6=4(2)4-3=1(3)остался 1спортсмен

Автор ответа: GiziLoo

10-6=4(2) 4-3=1 (3) 1 спортсмен остался

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Invisible aids of man.

One need not have anything to do with medicine as such to know of the existence ol such powerful therapeutic agents as penicillin, Chloromycetin or streptomycin. These are all antibiotic substances, products of the life- activity of harmless microbes and small fungi which are lethal to other pathogenic fungi and microbes.

Only some 25 years ago medical men had almost no means for combating many diseases caused by microbes. Septicemia, for example was almost invariably taial. Antibiotic substances now cure such serious ailments as pneumonia, septicemia, meningitis, some forms of tuberculosis, tularemia and bubonic plague. During the war antibiotic substances saved the lives of thousands of wounded at the front.

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The antibiotic action of green mould, from which penicillin was subsequently obtained, was first discovered by the Russian physicians V.A. Manasscin and A.G. Polotebnov as far back as the 70's of last century. They not only established that mould retards the growth of microbes, but also successfully treated various kinds of ulcers with compresses for which mould was used. Although these Russian scientists were unable to extract the active element, penicillin, from the mould, owing to the low level of technical development their time, their discovery to a great measure paved the way for the subsequent use of penicillin as a therapeutic agent.

Thirty-five years later V.G. Tanakovsky, a Russian veterinary, published a paper on the results of his experiments which showed that a certain form of mould killed the microbe causing typhus. This expanded still further the range of microorganisms known to science whose vital activities are inhibited by substances produced by mould.

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